Chapter 3
92
••••
Peripheral Control
eSL/eSLS Series (+ eSLZ000) User’s Manual
3.6 Analog to Digital Converter (eSL and eSLZ000
only)
Analog to Digital Converter (ADC) is a 12-bit data acquisition
module that is
embedded in the eSL voice chips. It consisted of an 8-channel multiplexer, a
microphone pre-amplifier, an Automatic Gain Control (AGC) function with
gain amplifier, 12-bit Successive Approximation (SAR) Analog to digital
converter (ADC), and a voltage reference. There are 8 single-ended analog
input channels in the module. The XP/YP input channel which is integrated
with the touch panel, shares the common pins with two general analog inputs as
ADIN0/ADIN1. The other 6-channel general analog inputs share their common
pins with GPIO (PORTC2~7).
Analog to Digital Converter
Attributes and Definitions:
Item
Resource
Clock source
F
PLL
, TEXI2 rising edge
Usage register
ADCD, ADCON
Interrupt sources
ADIF, PDTIF
/O function pin
ADIN[7:0], VREF, AMPO, MIC, AGC,
Xn, Yn
Operation mode
Single, Free-run
TPAD
Wakeup
NOTE
ADC input resistance is 10~20KΩ, input capacitance is 5~10pF
Summary of Contents for eSL Series
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